On June 2, 1924, President Calvin Coolidge signed a bill granting Native Americans full citizenship. Coolidge posed with four Osage Indians in front of the White House to commemorate the event. The President was later made a chief of the Sioux by Henry Standing Bear for his role in achieving full citizenship for Native Americans.
Source
American Memory Project. "Osage Indians." June 2, 1924 and American Memory Project. "President Coolidge being made Sioux Chief by Henry Standing Bear." 1927. (21 Feb 2006). Created by Gary Keith and Mike Frost.